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Addition of subspaces

  1. Jan 26, 2009 #1
    What exactly is the "addition of subspaces?" It is obviously not the same as the "union of subspaces," since the union of subspaces A and B in V is a subspace of V only if A is contained in B (or B is contained in A).
  2. jcsd
  3. Jan 26, 2009 #2
    You should probably only ask the same question in one place.
  4. Jan 26, 2009 #3


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    It probably refers to the direct sum of two vector spaces. Link.
  5. Jan 26, 2009 #4
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